{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1023-1BE40","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1023-1BE40","canonicalUrl":"https://aoctrl.com/siemens/3RT1023-1BE40","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1023-1BE40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS, power contactor, Size S0, 3RT1023-1BE40, AC-12 10 A, AC-2 4 kW at 400 V, AC-4 8.5 A at 400 V, screw terminals, DIN-rail snap-on mounting, IP20 front.","salesMarkdown":"Rated 10 A in AC-12 duty, so it handles resistive and lightly inductive loads up to that current. For motor switching, it delivers 4 kW at 400 V in AC-2 (slip-ring motor start/run) and 8.5 A at 400 V in AC-4 (plugging/inching). DC switching is covered: 10 A at 24 V, 2 A at 60 V, 1 A at 110 V, 0.3 A at 220 V — useful for battery-backed or DC distribution circuits. ## Integration Notes Screw-type terminals on the main current circuit accept 2x (1 to 2.5 mm²) or 2x (2.5 to 6 mm²) stranded, up to 2x 10 mm². The auxiliary circuit uses 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²) solid, max 2x (0.75 to 4 mm²). IP20 on the front, IP00 at the terminals — panel builders should account for terminal protection in the enclosure design. Coil holding power is 5.4 W DC, and the magnet coil draws the same closing power. Pollution degree 3 suits industrial environments with conductive contamination.","metaTitle":"Siemens 3RT1023-1BE40 SIRIUS Power Contactor, Size S0, 10 A","metaDescription":"Siemens 3RT1023-1BE40 SIRIUS power contactor, Size S0, 10 A AC-12, 4 kW AC-2 at 400 V, 8.5 A AC-4, screw terminals, DIN-rail mount. Active production, quoted on request.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"101 mm","Solid":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), max. 2x (0.75 ... 4 mm²)","Width":"45 mm","Height":"85 mm","Maximum":"2 000 m","At The Side":"6 mm","Rated Value":"60 V","On The Front":"IP20","Initial Value":"0.8","Mounting type":"screw and snap-on mounting onto 35 mm standard mounting rail according to DIN EN 50022","Of The Terminal":"IP00","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","Full-scale value":"1.1","Size of contactor":"S0","Product brand name":"SIRIUS","Degree of pollution":"3","Product designation":"power contactor","at 24 V rated value":"10 A","at 60 V rated value":"2 A","Of Contactor Typical":"10 000 000","at 110 V rated value":"1 A","at 220 V rated value":"0.3 A","at 230 V rated value":"6 A","at 400 V rated value":"3 A","at 500 V rated value":"4.5 kW","at 690 V rated value":"5.5 kW","Instantaneous Contact":"0","Side-by-side mounting":"Yes","For Main Current Circuit":"screw-type terminals","Single Or Multi-Stranded":"2x (1 ... 2,5 mm²), 2x (2,5 ... 6 mm²), max. 2x 10 mm²","at AC-2 at 400 V rated value":"4 kW","at AC-4 at 400 V rated value":"8.5 A","Closing power of magnet coil at DC":"5.4 W","Holding power of magnet coil at DC":"5.4 W","Operating current at AC-12 maximum":"10 A","With Type Of Assignment 2 Required":"fuse gL/gG: 25 A","at AWG conductors for main contacts":"2x (16 ... 12), 2x (14 ... 10), 1x 8","With Type Of Coordination 1 Required":"fuse gL/gG: 63 A","Reference code acc. to DIN EN 81346-2":"Q","Number of NC contacts for main contacts":"0","Number of NO contacts for main contacts":"3","Finely Stranded With Core End Processing":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","Number of poles for main current circuit":"3","at AWG conductors for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14), 1x 12","Contact reliability of auxiliary contacts":"1 faulty switching per 100 million (17 V, 1 mA)","For Auxiliary And Control Current Circuit":"screw-type terminals","at ambient temperature 40 °C rated value":"40 A","Type of voltage of the control supply voltage":"DC","Of The Contactor With Added Auxiliary Switch Block Typical":"10 000 000","For Short-Circuit Protection Of The Auxiliary Switch Required":"fuse gL/gG: 10 A","Of The Contactor With Added Electronics-Compatible Auxiliary Switch Block Typical":"5 000 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=274147&mlfb=3RT1023-1BE40","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1023-1BE40/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RT1023-1BE40 and how do I get a price?","answer":"Submit an RFQ through this listing. The part is sourced to order via independent distribution; availability and current pricing are confirmed at quote time."},{"question":"Will 3RT1023-1BE40 drop into a panel that was specified around 3RT1023-1AL20 without rewiring?","answer":"Both are Size S0 SIRIUS contactors with the same 45 mm width and DIN-rail mounting, so the mechanical fit is identical. The 1BE40 uses a DC coil (24 V nominal) while the 1AL20 uses an AC coil — verify the control voltage before swapping."},{"question":"What compliance documentation does this brand provide for 3RT1023-1BE40?","answer":"Siemens SIRIUS contactors typically carry CE, UL, CSA, and CCC certifications; the reference code per DIN EN 81346-2 is Q. Specific certificates should be confirmed at order."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1023-1BE40","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/siemens/3RT1023-1BE40 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-02T08:15:54.622Z","lastPublished":"2026-09-02T08:15:54.622Z","indexable":true}}